1) just you remove the old drive and mount the new drive..
2) Boot up Windows, hit the start button, and in the search box type either “Create and” or “Disk man”, and click “Create and Formant Hard Disk Partitions”. This program is also accessible through Control Panal -> System and Security -> Administrative Tools -> Create and Formant Hard Disk Partitions.
3) If these drives have never been used, it may ask you to initialize them, in which case you’ll most likely be using “MBR”.
4)If the new disks do not say “Unallocated” in them, then delete their volumes by right-clicking on each disk’s volume and going to “Delete Volume”
5)Now lets create the RAID: right-click on one of the disk (doesn’t matter which), and go to “New Mirror Volume”
6) A series of prompts will ask you about some details of your new mirrored volume (array), like which disks are to be included, size of the volume, drive letter assignment, and volume name. In my example, I chose Disk 1 and Disk 2 (Disk 0 being my original disk with the OS on it), the full size available (its default), drive letter M, quick format, and “WinMirror” as the volume name.
7) That’s it! Transfer all of your important files to your new “drive” and have a little peace of mind. Here’s an idea… map all of your Windows libraries (those default ones, Documents, Pictures, etc) to your mirrored array, and you can upgrade hardware / format and reinstall windows all day long and not have to worry about your data.